Opinions on this Koufax please

[whitehse]

I have a chance to pick this up at a great price (under 50 bucks) and was curious as to what everyone thought of it. There is a small back story here but I would like to hear thoughts on the authenticity first.

Thanks in advance

[koufax1fan]

Its good autograph !
Phil

[whitehse]

Thank you!!! I am excited to add it to the collection for a very decent price.